Apparatus for constructing concrete walls.



G. S. MUMP ORD. APPARATUS FOR GONSTRUGTING CONCRETE WALLS.

APPLICATION FILED AUG. 12, 1914- Patented Dec. 29, 1914.

hit l GURDON S. OF NEW YORK, N. Y.

APPARATUS FOR CONSTRUGTING CONCRETE WALLS.

To all whom it may concern v Be it known that I, GURDON S. MUMFonD, a citizen of the'United States of America, residing at ew York, in the county of New York and State of New Yorlnhave invented certain new and useful Improvements in Apparatus for Constructing Concrete Walls, of which the f ollowingis a specification. 7

This invention relates to an apparatus for constructing concrete walls and in its more intense aspect, to a device for'holding certain parts of amolding apparatus in place during the process of casting.

In order that the present invention may be more clearly understood, it may be noted by way of explanation that in castingconcrete walls, morev particularly cellar and foundation walls, as Well as the upper walls of a building, it is customary to employ side molds extending either to the full height of the finished wall or sectional molds which are progressively raised in a'step by step manner as the wall is cast. In using apparatus of the latter character more particularly, some diificulty has been experienced in poperly spacing and tying the lower edges of the sectional mold together to prevent lateral movement thereof: in either direction during the actual pouring of the concrete and casting ofthe wall. 1 Various devices have beeIIempIOyecLZbut they have been accompanied by certain objections thatrender them commercially impractical. For example, should it be attempted to use a hollow sleeve surrounding a transverse tie bolt from which the bolt is withdrawn after the casting of the wall, there is always the danger that the hole left by the sleeve will be improperly sealed, thereby leaving a transverse leak in the finished wall; If on the other hand, the sleeve should be omitted and a single transverse rod used, the outer ends of which were bolted or clamped to the outer surface of the side mold members, these rods would have to be withdrawn on dismantling the mold which would leave a transverse opening accompanied by the same objection. Should it be attempted to use a shorter transverse rod having threaded ends adapted to engage socket bolts passing through the side mold members to avoid this objection, there would occur the objection of expense in constructing a tie device of this character as well as the absence of an efficient anchor.

Specification of Letters Patent.

Patented Dec. 29, 1914.

Application filed. August 12, 1914. Serial No. 856,454;

. The present invention is designed to overcome the above possible objections and to provide a simple and practical device which would be cheap to manufacture.

Another object is to provide a device of the above character which will be reliable and eil'icient in use.

A further object is to provide a device the above character which will not only act as a tie and spacing means for the mold members during-the casting operation, but will also act as a reinforcement for the finished wall and permit a more rapid operation of the casting of the wall.

Other objectsuvill be in part obvious and in part hereinafter pointed out.

The present invention accordingly con sists' in the features of construction, combination oi elements and arrangement of parts which will be exemplified in the device hereinafter described, and the scope of the application of which will be indicated in the following claims.

In the accompanying drawing, there is shown in sectional elevation one of various possible embodiments of the present invention and while this invention will be herethe tie means forming the subject of this invention is capable of various uses and ap plications and is not to be limited to its relation to a molding device of this or any other particular character.

Referring to the drawing in detail, which is more orless diagrammatic, there is denoted at and 6 a pair of coacting side mold members between which is positioned a hollow core 7 for the purpose of casting a double or hollow concrete wall therebetween. These mold members are adapted to be iu'ogressively raised in the present instance after permitting the wall cast therebetween to have partially set. Suitable guides and framework (not shown) are, of course,'provided for guiding and directing the moven'ientoi these mold members.

It has been-foundby experience that in using mold members of relatively large size approximately twenty-five feet long by four feet high and each weighing several hundred pounds that it has been diiiicult to properly clamp orhold the lower edges especially of the side molds against lateral movement during the casting operation. A.

tie member such as herein disclosed com-.

prises a piece of wire 8 having each end wound into a helical coil 10 adapted to be;

made of a single piece of relatively heavy steel wire in a stock size having a total length substantially equal to a thickness of the finished wall and the angle 12 portion connecting the central portion or body of the wire with the coiled ends is preferably tempered or hardened to prevent any stretching whatsoever of the tie during the positioning of the mold.

In use the mold members 5 and 6 are approximately positioned with respect to the plane of the finished wall, the tie members 8 inserted therebetween .at desired intervals, and one of the bolts 11 is passed through the opening in one side member and screwed into the helical end to its full depth there by drawing the inner side of the mold. snug against the helical end of the tie. The other bolt 11. is then inserted in a similar manner in the opposite mold and tightened which draws the molds together and positively holds them againstlateral; movement in either direction. If a core 7 were used as in casting a hollow wall, the core is preferably made in sectional form so as to fit between and closely adjacent the tie members being separated only by the diameteno'f 'the wire,

: although if a complete mold and core were constructed as of boards the tieswould be placed between the boards thereof when built. The wall is then cast by pouring semi-liquid cones-etc or cement between the moldtllhd coreand after it has partially set, the bolts 11 are withdrawn and the side molds raised to cast the next layer. The tie member remains in the wall and by reason of its enlarged roughened or corrugated ends acts as a reinforcement or anchor securely holding the partially set walls against lateral movement. In this manner, the wall may be cast much more rapidly than could be done if a straight, tie were used for example, having socket bolt' Theexpense of'su h construction is clearlv very small for the tie in the form herein shown? may be made of plain wire in large quantities at a relatively small expense and the bolts, side molds and core may be repeatedly used.

It is thus seen that the present invention provides a simple, practical and inexpensive "adapted to receive threaded a threaded end engaging device which is reliable and eiiicient in use, adapted-to accomplish among others all of the objects and advantages above set forth.

As many changes could be made in-the above construction and many widely different embodiments of the invention could be made, without departing from the scope thereof, it is intended that all mat. ter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. An improved tie member comprising a wirehaving a straight body portion and its ends continued in the same direction and bent into enlarged helices adapted to co-act with threaded bolts and bear against the inner Walls of mold members. I

2. A tie member for concrete molds coma'pparently' prising a straight body portion having its ing through mold members to draw the ends of the tie member into engagement with the,

inner faces ofthe mold. v

3. A tie member for concrete molds comprising a single piece of relatively solidimaterial adapted to be leftin the finished wall and formed at each end with a helical anchoring device adapted to co-act with bolts passing through the mold members to draw the anchoring devices into engagement with the inner faces of the mold members.

4. A tie member for concrete molds comprising a straight body portion having its ends bent into helical anchoring devices adapted to receive threaded boltspassing through the mold members, said devi ces being hardened or tempered between the helical ends and the body portion.

5. 'A tie member for concrete molds comprising a straight body portion having its ends bent into helical anchoring devices bolts passingv through the mold members, said devices be ing hardened or tempered between the helical ends and the body portion, and said helical ends and bodyportion lying in substanf tially the same straight line.

Witnesses;

ERESA VAUGHEY, WALTER B. WALKER.

GURDON s. MUMFORD. 

